Hi Tareq,
What mount are you using? And I take it you have tried guiding but weren't getting good results?
You said you have a 60mm guide scope. This should work fine for any scope up to around 1000mm Focal length.
I don't think the guide camera is going to make too big a difference here for you. So any camera that has guiding capability should be able to guide your 80mm or 8 inch scope.
I struggled for quite some time with guiding also as it never seemed to tame the trailing enough.
Few things to double check on your setup before I'd worry about upgrading your equipment.
1: How good is your polar alignment? - Aim for less than an arc-min. Although mine is usually around the 1 arc-min or so as per PHD2 drift align tool.
2: Make sure your scope is balanced in both RA and DEC properly - I might balance the scope, sometimes I've had to adjust the counterweight on the RA to get guiding to behave even after the initial balance. (very minor tweak mind you).
3: Guiding settings - What program do you use to control guiding? Can provide some more details around this once I know what your using. If your using standalone guiders, hopefully someone else can help out as I've had no experience with using one.
4: Make sure your guide scope and imaging scope are aligned and point to the same are of sky. You ideally want the guide camera to point to a star in the field of view of the imaging scope. If the guidescope is not aligned this could cause some guiding issues also.
I think checking polar alignment and balance are the major things to do first. As Alex mentioned he can get 30-40 sec subs with no guiding on an 8 inch scope. so even with a basic guiding setup (50mm guidescope and as most beginners use a ZWO120mm guide camera) he should be able to get up to 2-5min subs quite easily. Although guiding an 8 inch scope is much more difficult than a small refractor from what I hear...
So there is no reason why your current equipment shouldn't be up to the job of guiding your scopes. It's just a matter and playing and getting things right now.
Took alot of frustrating nights for me to work out guiding as well Tareq. Almost to the point of throwing the towel in and giving up. But once I worked it out, it's the easiest thing and you wonder how you ever got it so wrong in the first place.
